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Method for estimating the dilution of fuel in oil of an internal combustion engine

An internal combustion engine, engine technology, applied in the direction of internal combustion piston engine, combustion engine, engine control, etc., can solve the problem of incorrect and overestimated fuel evaporation or vaporization, and achieve the effect of improving determination, easy determination and reliable acquisition.

Active Publication Date: 2022-06-21
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Evaporation models of methods known in the prior art tend to overestimate the evaporation or vaporization of the fuel because regeneration is repeated
[0009] Also, it has been found that using only water temperature to characterize the vaporization of fuel is incorrect

Method used

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  • Method for estimating the dilution of fuel in oil of an internal combustion engine
  • Method for estimating the dilution of fuel in oil of an internal combustion engine
  • Method for estimating the dilution of fuel in oil of an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0030] figure 1 An internal combustion engine 1 (eg a diesel engine) is represented, the cross section of a single cylinder of which has been drawn. The engine 1 is here supercharged by a turbo compressor 2 and its exhaust gas is treated by an exhaust gas treatment device 3 .

[0031] The engine 1 is supplied with air through an air circuit comprising an air inlet 4, a compressor 5 of the turbo compressor 2 and an air intake duct 6, one end of which emerges in the combustion chamber 7 of the engine. The chamber 7 receives at least one injector 8 which injects fuel (eg diesel) into the chamber 7 for combustion with air.

[0032] The exhaust gas produced by the combustion in the chamber 7 is discharged to the turbine 9 of the turbo compressor 2 via the exhaust manifold 10 . The gas passes through the turbine 9 , the exhaust duct 11 and the processing device 3 . They are finally discharged to the outside atmosphere through the exhaust muffler 12 .

[0033] The treatment devic...

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PUM

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Abstract

The invention relates to a method for estimating the dilution ratio of a fuel in the oil of an internal combustion engine equipped with a combustion gas treatment device requiring a fuel post-injection regeneration phase, during a step performed prior to the method, the composition of said fuel being defined Multiple parts of (F 1 , F 2 ,...F x ), each part (F i ) have different densities, and the method includes: repeatedly at a series of moments (t, t+dt) by adding the dilution ratio (T(t)) estimated at the previous moment to the dilution ratio change value (dT) to estimate the dilution ratio (T) based on the fractions (F 1 , F 2 ,...F x ) in each part (F i ) calculated as an estimate of the change in dilution ratio (dTi).

Description

technical field [0001] The present invention relates to a method for estimating the dilution of fuel in oil of an internal combustion engine, more particularly an engine equipped with a polluting emissions treatment device by post-injection of fuel into the cylinders of the engine Regenerate periodically. When a threshold of dilution of the fuel in the oil is reached, the engine drain interval can be accurately determined. Background technique [0002] Many modern engines are equipped with exhaust gas treatment equipment, which operate in sequence. For example, most diesel engines are equipped with particulate filters. In normal operation with thin mixtures, these devices capture contaminants but do not treat them. Periodically, when a parameter representing the amount of accumulated pollutants (such as the pressure drop in the equipment) reaches a pre-defined value, the engine's computer triggers a so-called regeneration phase, during which engine settings are modified t...

Claims

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Application Information

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IPC IPC(8): F01M11/10F02D41/02F02D41/04
CPCF02D41/22F01M11/10F02D2200/0611F02D2250/11
Inventor M·梭罗B·佩拉德
Owner RENAULT SA